mirror of
https://github.com/denoland/deno.git
synced 2024-12-14 03:23:17 -05:00
5b9620df7a
Implements fast scheduling of deferred op futures.
```rs
#[op(fast)]
async fn op_read(
state: Rc<RefCell<OpState>>,
rid: ResourceId,
buf: &mut [u8],
) -> Result<u32, Error> {
// ...
}
```
The future is scheduled via a fast API call and polled by the event loop
after being woken up by its waker.
53 lines
1.9 KiB
Text
53 lines
1.9 KiB
Text
struct op_read_fast {
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_phantom: ::std::marker::PhantomData<()>,
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}
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impl<'scope> deno_core::v8::fast_api::FastFunction for op_read_fast {
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fn function(&self) -> *const ::std::ffi::c_void {
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op_read_fast_fn as *const ::std::ffi::c_void
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}
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fn args(&self) -> &'static [deno_core::v8::fast_api::Type] {
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use deno_core::v8::fast_api::Type::*;
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use deno_core::v8::fast_api::CType;
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&[V8Value, Int32, Uint32, TypedArray(CType::Uint8), CallbackOptions]
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}
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fn return_type(&self) -> deno_core::v8::fast_api::CType {
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deno_core::v8::fast_api::CType::Void
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}
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}
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fn op_read_fast_fn<'scope>(
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_: deno_core::v8::Local<deno_core::v8::Object>,
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__promise_id: i32,
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rid: ResourceId,
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buf: *const deno_core::v8::fast_api::FastApiTypedArray<u8>,
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fast_api_callback_options: *mut deno_core::v8::fast_api::FastApiCallbackOptions,
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) -> () {
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use deno_core::v8;
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use deno_core::_ops;
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let __opts: &mut v8::fast_api::FastApiCallbackOptions = unsafe {
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&mut *fast_api_callback_options
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};
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let __ctx = unsafe {
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&*(v8::Local::<v8::External>::cast(unsafe { __opts.data.data }).value()
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as *const _ops::OpCtx)
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};
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let state = __ctx.state.clone();
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let buf = match unsafe { &*buf }.get_storage_if_aligned() {
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Some(v) => v,
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None => {
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unsafe { &mut *fast_api_callback_options }.fallback = true;
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return Default::default();
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}
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};
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let result = op_read::call(state, rid, buf);
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let __op_id = __ctx.id;
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let __state = ::std::cell::RefCell::borrow(&__ctx.state);
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__state.tracker.track_async(__op_id);
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let __get_class = __state.get_error_class_fn;
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let result = _ops::queue_fast_async_op(
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__ctx,
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async move {
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let result = result.await;
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(__promise_id, __op_id, _ops::to_op_result(__get_class, result))
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},
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);
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}
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